As for Elvin Jones' remembrance that he played with Duke for one week and a half, I am afraid he exaggerated a bit.
Louis Bellson left the band before Duke and his men started the European tour (first concert in Lisbon, February 23, 1966).
Skeets Marsh was hired to replace Bellson during this European tour, but suddenly Ellington decided to replace him, calling on Elvin Jones to join him for the January 28 Frankfurt concert.
Ellington then changed his mind, and Jones returned to the US after playing only 4 concerts with the Ellington troupe: Frankfurt (January 28, Jahrhunderthalle), Paris (January 29, Salle Pleyel), Milan (January 30, Teatro Lirico) and Geneva (January 31, Victoria Hall).
Sam Woodyard was brought to Europe for the February 2 Zurich concert (in fact other sources state that he already replaced Jones in the January 31, Geneva concert), and the rest of the tour.
Marsh left the band when it returned to the US, and Woodyard, who was supposed to only be subbing for Bellson, stayed on.
(sources: New DESOR, TDWAW and the DEMS Bulletin)